from datetime import datetime

from flask import render_template, flash, redirect, url_for, request
from flask_login import current_user, login_user, logout_user, login_required
from werkzeug.urls import url_parse

from app import app, db
from app.models import User,Post
from app.forms import LoginForm, RegistrationForm, ResetPasswordRequestForm,PostForm

from app.forms import EditProfileForm
from app.email import send_password_reset_email
from app.forms import ResetPasswordForm


@app.route('/')
@app.route('/index', methods=['GET', 'POST'])
@login_required
def index():
    form = PostForm()
    if form.validate_on_submit():
        post = Post(body=form.post.data, author = current_user)
        db.session.add(post)
        db.session.commit()
        flash("Your Post is now live")

    # user = {'username':'Mk'}
    posts = [
        {
         'author':{'username':'John'},
         'body':"Beautifu day in Portland!"},
        {
         'author':{'username':'Suan'},
            'body':'The Auengers movie was so cool!'
        }
    ]

    return render_template('index.html', posts=posts, form=form, post=post)


@app.route('/explore')
@login_required
def explore():
    posts = Post.query.order_by(Post.timestamp.desc()).all()
    return render_template('index.html', title="Explore", posts=posts )



# @app.route('/login',methods=["GET","POST"])
# def login():
#     form = LoginForm()  # 表单实例化
#     if form.validate_on_submit():
#         flash('Login requested for user {},remember_me={}'.format(form.username.data,form.remember_me.data))
#         return redirect(url_for("index"))
#     return render_template('login.html',title = 'Sigin In',form=form)

# 注册
@app.route('/register',methods = ['GET','POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('index'))

    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(username=form.username.data, email=form.email.data)
        user.set_password(form.password.data)
        db.session.add(user)
        db.session.commit()
        flash('Congratulations, you are now a registered user!')
        return redirect(url_for('login'))
    return render_template('register.html', title='Register', form=form)

# 重置密码
@app.route('/reset_password_request', methods=['GET', 'POST'])
def reset_password_request():
    if current_user.is_authenticated:
        return redirect(url_for('index'))
    form = ResetPasswordRequestForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user:
            send_password_reset_email(user)
        flash('Check your email for the instructions to reset your password')
        return redirect(url_for('login'))
    return render_template('reset_password_request.html',
                           title='Reset Password', form=form)


@app.route('/reset_password/<token>', methods=['GET', 'POST'])
def reset_password(token):
    if current_user.is_authenticated:
        return redirect(url_for('index'))
    user = User.verify_reset_password_token(token)
    if not user:
        return redirect(url_for('index'))
    form = ResetPasswordForm()
    if form.validate_on_submit():
        user.set_password(form.password.data)
        db.session.commit()
        flash('Your password has been reset.')
        return redirect(url_for('login'))
    return render_template('reset_password.html', form=form)
# 登录
@app.route("/login", methods=["GET","POST"])
def login():
    if current_user.is_authenticated:
        return redirect(url_for("index"))

    form = LoginForm()  # 实例化表
    if form.validate_on_submit():
        user = User.query.filter_by(username=form.username.data).first()
        if user is None or not user.check_password(form.password.data):
            flash('Invalid username or password')
            return redirect(url_for('login'))
        login_user(user,remember=form.remember_me.data)  # 是否记住用户

        # 重定向到next页面
        next_page = request.args.get('next')  # 获取url next参数
        if not next_page or url_parse(next_page).netloc != " ":
            next_page = url_for('index')

        return redirect(next_page)
    return render_template('login.html',title= 'Sign In', form=form)

# 退出登录
@app.route('/logout')
def logout():
    logout_user()
    return redirect(url_for("index"))

#  用户个人资料的视图函数
@app.route("/user/<username>")
@login_required  # 验证是否登录
def user(username):
    user = User.query.filter_by(username=username).first_or_404()   # 在没有结果的情况下，会自动将404 error发送回客户
    posts = [
        {"author": user, "body": "Test post #1"},
        {"author": user, "body": "Test post #2"},
    ]
    return render_template("user.html",user=user, posts=posts)

@app.route('/edit_profile',methods=['GET','POST'])
@login_required
def edit_profile():
    form = EditProfileForm(current_user.username)
    if form.validate_on_submit():
        current_user.username = form.username.data
        current_user.about_me = form.about_me.data
        db.session.commit()

        flash('Your changes have been saved.')
        return redirect(url_for('edit_profile'))
    elif request.method == 'GET':
        form.username.data = current_user.username
        form.about_me.data = current_user.about_me
    return render_template('edit_profile.html', title='Edit Profile', form=form)

